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54 lines
1.7 KiB
Swift
54 lines
1.7 KiB
Swift
//
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// URL-Extensions.swift
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// NetNewsWire
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//
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// Created by Stuart Breckenridge on 03/05/2020.
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// Copyright © 2020 Ranchero Software. All rights reserved.
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//
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import Foundation
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extension URL {
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/// Extracts email address from a `URL` with a `mailto` scheme, otherwise `nil`.
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var emailAddress: String? {
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scheme == "mailto" ? URLComponents(url: self, resolvingAgainstBaseURL: false)?.path : nil
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}
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/// Percent encoded `mailto` URL for use with `canOpenUrl`. If the URL doesn't contain the `mailto` scheme, this is `nil`.
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var percentEncodedEmailAddress: URL? {
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guard scheme == "mailto" else {
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return nil
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}
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guard let urlString = absoluteString.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed) else {
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return nil
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}
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return URL(string: urlString)
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}
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/// Reverse chronological list of release notes.
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static var releaseNotes = URL(string: "https://github.com/Ranchero-Software/NetNewsWire/releases/")!
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func valueFor(_ parameter: String) -> String? {
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guard let components = URLComponents(url: self, resolvingAgainstBaseURL: false),
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let queryItems = components.queryItems,
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let value = queryItems.first(where: { $0.name == parameter })?.value else {
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return nil
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}
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return value
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}
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static func reparingIfRequired(_ link: String?) -> URL? {
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// If required, we replace any space characters to handle malformed links that are otherwise percent
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// encoded but contain spaces. For performance reasons, only try this if initial URL init fails.
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guard let link = link, !link.isEmpty else { return nil }
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if let url = URL(string: link) {
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return url
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} else {
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return URL(string: link.replacingOccurrences(of: " ", with: "%20"))
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}
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}
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}
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